Assignment vs Transfer of a Commercial Lease: What’s the Difference?

If you’re running a small business, your premises can be one of your biggest ongoing commitments. So when your business needs change (maybe you’re moving location, scaling down, or selling the business), it’s normal to ask: can you “transfer” your commercial lease to someone else?

This is where a lot of confusion starts - because people often use the words assignment and transfer interchangeably.

In practice, “transfer of lease” is usually used as an everyday catch-all phrase, while assignment is one of the main formal legal mechanisms used to pass a commercial lease from one tenant to another.

In this guide, we’ll break down the difference between assignment and transfer of a commercial lease, explain what the process usually looks like for UK commercial property, and highlight what you should watch out for before you commit.

What Does “Transfer Of Lease” Mean In A UK Commercial Lease?

In everyday business conversations, a “transfer of lease” usually means:

• you stop being the tenant under the lease, and
• someone else takes over your position and obligations.

That’s the commercial outcome. But legally, you need to identify how this change happens, because different routes carry different risks, documents, and landlord requirements.

In the UK, the most common legal routes people are referring to when they say “transfer” include:

• Assignment (you assign your lease to a new tenant)
• Subletting (you remain the tenant, but grant a sublease to someone else)
• Surrender and regrant (you surrender your lease back to the landlord, and the landlord grants a new lease to the incoming occupier)

Because “transfer” is a broad term, the real question is: are you assigning the lease (a legal transfer) or doing something else?

Before you make decisions, it’s usually worth getting the lease checked so you understand what’s permitted - a Commercial Lease Review can help you avoid nasty surprises in the fine print.

What Is An Assignment Of Lease (And Why It’s The “Legal Transfer” Most People Mean)?

An assignment of a commercial lease is a legal process where you (the current tenant) transfer your lease to a new tenant (the assignee).

After completion:

• the new tenant steps into your shoes and becomes responsible for the lease going forward, and
• you stop occupying the premises (and usually stop paying rent), subject to any ongoing liability you might still have under the lease or law.

In other words, assignment is a common formal legal route to “transfer” a lease - and it’s usually documented using a Deed of Assignment.

Where Does UK Law Fit In?

Commercial lease assignment sits within a framework of contract law and landlord and tenant law. Two key concepts often come up:

• Landlord consent (most leases require it before you can assign)
• Ongoing liability (even after assignment, you may still be “on the hook” in some cases)

In particular, the Landlord and Tenant (Covenants) Act 1995 changed how liabilities pass on assignment for “new leases” (generally leases granted from 1 January 1996). As a general rule, it aims to release outgoing tenants from future liability when they assign - but there are important exceptions (including where an authorised guarantee agreement is properly required).

This is why it’s not enough to assume “once I transfer it, I’m free”. You want to check what the lease says and what the landlord is requiring as a condition of consent.

So What’s The Difference Between Assignment And Transfer Of Lease?

Here’s the clearest way to understand the difference between assignment and transfer of lease:

• “Transfer of lease” is usually an informal phrase describing the result (someone else takes over).
• “Assignment” is a specific legal mechanism that can be used to achieve that result (a contractual transfer of the tenant’s interest to a new tenant).

So if you’ve been searching for the difference between assignment and transfer of lease, “transfer” is often used to describe an assignment - but you should still confirm which route you’re actually taking, because the legal consequences can be very different.

A Quick Comparison

Assignment (A Common “Transfer” Route)

• You leave the lease entirely (subject to any ongoing liabilities)
• New tenant becomes your replacement under the same lease
• Usually needs landlord’s written consent
• Documented by a deed (often plus a licence to assign)

Sublease (Not a True Transfer)

• You remain the tenant under the headlease
• You grant a new lease to your subtenant
• You’re typically still liable to the landlord if the subtenant defaults
• Often needs landlord consent and must follow conditions in the headlease

If you’re considering a subletting arrangement, it’s worth understanding how it works in practice because the risk profile is different to assignment - especially around rent defaults and dilapidations. A sublease can be useful, but it needs careful structuring.

When Should A Small Business Use Assignment vs Other “Transfer” Options?

The right option depends on what you’re trying to achieve, your lease terms, and what your landlord will agree to.

Assignment Is Often Used When You’re Exiting The Premises

Assignment is usually the go-to option if you:

• are relocating your business and don’t need the premises anymore
• are selling the business and want the buyer to take over the lease
• have a long time left on the lease and don’t want to pay for unused space

Practical example: You run a café and your foot traffic has shifted. You find another operator who wants your location and is happy with the existing lease terms. Assignment can let them take over your lease (subject to landlord consent) so you can move on without carrying rent for the remainder of the term.

Subletting May Suit Temporary Changes (But You Keep Liability)

Subletting can make sense if you:

• only need to reduce costs for a period (e.g. you’re not ready to fully exit)
• want to keep the premises for future use
• can’t assign, but the lease allows subletting

Just keep in mind: if your subtenant fails to pay, your landlord will usually still come after you. So it’s important you have a strong sublease agreement and a clear plan for enforcement.

Surrender And Regrant Might Be Used When Lease Terms Need To Change

Sometimes assignment isn’t commercially workable because:

• the landlord won’t consent to assignment (or will only consent on conditions that don’t suit you)
• the incoming party wants new terms (different rent, term length, break clauses)
• your lease contains restrictions that make assignment difficult

In these situations, surrender and regrant can be a practical alternative - but it’s essentially a new lease negotiation, with its own costs, timing, and risks.

Do You Need The Landlord’s Consent To Assign Or Transfer A Commercial Lease?

In most commercial leases, yes - you’ll need landlord consent before you can assign, and sometimes before you can sublet.

Typically, your lease will include “alienation” provisions (these are the clauses dealing with assignment, subletting, sharing occupation, and similar arrangements).

What Does Consent Usually Look Like?

Landlord consent is commonly documented in a Licence to Assign (or licence to underlet, if subletting). This is a contract between you, the landlord, and sometimes the incoming tenant.

Depending on your lease, you might also need additional documents such as:

• Authorised Guarantee Agreement (AGA) (where you guarantee the incoming tenant’s performance)
• a rent deposit deed
• a guarantor deed (if the new tenant needs a guarantor)
• evidence the new tenant can pay (accounts, references, business plan)

It’s common for landlords to also request payment of their professional costs for dealing with the consent process.

Can A Landlord Refuse Consent?

It depends on the lease wording and the circumstances.

If your lease says landlord consent is required and it’s “not to be unreasonably withheld”, then (in broad terms) the landlord must deal with the request within a reasonable time and cannot refuse consent on unreasonable grounds. This concept is supported by UK landlord and tenant legislation, including section 19 of the Landlord and Tenant Act 1927 (and related case law and legislation, depending on the facts).

That said, “reasonable” is fact-specific and can still allow refusal (or conditions) where, for example, the incoming tenant’s financial position is weak, their proposed use would breach the lease, or the assignment would create a genuine risk to the landlord’s investment.

What Documents And Legal Details Matter Most In A Lease Assignment?

When you’re assigning a commercial lease, the paperwork isn’t just admin - it’s what decides who is responsible for what, and whether you’ve genuinely protected yourself when you hand the lease over.

1) The Deed Of Assignment

This is the core transfer document. It must be drafted correctly and executed properly as a deed.

Deeds have specific signing requirements, and mistakes can cause real headaches later (including disputes about whether the assignment is valid). If you’re unsure about formalities, it’s worth reading up on executing deeds so you know what is required in England and Wales.

2) Licence To Assign (Landlord Consent)

This is where many commercial risks sit, because it often contains conditions like:

• requiring you to enter into an AGA
• confirming any landlord fees you must pay
• setting out pre-conditions (e.g. the new tenant must sign a direct covenant)

It’s also common for the landlord to include “no release” wording that can expand your continuing exposure if you’re not careful.

3) Any Guarantee Or Rent Deposit Arrangements

If the landlord isn’t comfortable with the incoming tenant’s financial position, they may require:

• a personal guarantor (often a director), or
• a rent deposit (sometimes 3–12 months’ rent), or
• both.

From your perspective, you’ll want to make sure the landlord isn’t relying on you as the security, unless you’re comfortable with that risk.

4) Execution Formalities (Witnessing And Authority)

Because assignment documents are usually deeds, signing needs to be done properly. For individuals, that typically involves a witness. For companies, execution rules can differ depending on whether you have one director, two directors, or a director and company secretary.

If you’re arranging signing in a rush (which happens a lot in lease matters), it’s worth confirming who can witness a signature so you don’t accidentally invalidate the document.

5) Occupation Arrangements (If You Need A Short-Term Bridge)

Sometimes you need a short gap between moving out and the incoming party taking over (or you need a temporary occupier while you find a permanent assignee). In limited situations, a licence to occupy might be considered - but it’s not a substitute for proper assignment or a lease, and it can create risk if used incorrectly.

As always, the right document depends on what you’re actually doing in the premises and what the landlord allows.

Common Risks And A Practical Checklist Before You “Transfer” Your Lease

A lease “transfer” can feel like a clean exit - but small businesses often get caught out by hidden liabilities or missed steps.

Here are some of the most common risks we see.

Risk 1: Assuming You’re Released Automatically

Even where the law aims to release outgoing tenants on assignment, your lease terms and the landlord’s consent documents can create ongoing obligations - especially if you sign an AGA.

What to do: check whether the landlord is asking you to guarantee the new tenant, and make sure you understand exactly when that guarantee ends.

Risk 2: Missing A Condition In The Lease

Your lease might prohibit assignment entirely, or allow it only if specific conditions are met (for example, assignment only of the whole premises, not part).

What to do: review the alienation clauses early and confirm the required process before you negotiate with a potential incoming tenant.

Risk 3: Poor Due Diligence On The Incoming Tenant

If you agree to guarantee the incoming tenant (via an AGA), their ability to pay rent matters to you.

What to do: ask for basic comfort on their financials and business plan, and consider negotiating limits (where possible).

Risk 4: Dilapidations And Repair Obligations

Even if you assign, you may still have disputes about the condition of the premises at handover - and some leases require you to remedy breaches before assignment is allowed.

What to do: check repairing obligations, consider a schedule of condition (where relevant), and deal with any outstanding breaches upfront.

Risk 5: Timing And Costs Blowouts

Landlord consent can take time. Landlords often require references, formal applications, and payment of their legal fees before they’ll issue consent.

What to do: build time into your plan (especially if you have a business sale completion date), and budget for landlord costs.

A Quick Checklist

• Confirm whether you’re doing an assignment, sublease, or surrender and regrant.
• Read the alienation clause and identify the consent process.
• Agree heads of terms with the incoming party (commercial points first).
• Prepare the application pack for landlord consent (references, accounts, ID checks).
• Review whether an AGA is required and what risk it creates for you.
• Make sure the deed is signed and witnessed correctly.
• Keep a written record of consents, completion documents, and dates.

If you’re time-poor (most business owners are), getting advice early can save you from costly delays later - particularly where the landlord’s consent documents introduce obligations you weren’t expecting.

Key Takeaways

• The difference between assignment and transfer of lease is that “transfer” is often used informally, while assignment is a formal legal mechanism that can be used to pass a commercial lease to a new tenant.
• Assignment usually means the new tenant takes over the lease, but you may still have ongoing liability depending on the lease and whether you sign an authorised guarantee agreement (AGA).
• Most commercial leases require landlord consent before you can assign (and often before you can sublet), usually documented in a Licence to Assign.
• Alternatives to assignment include subletting (where you remain liable to the landlord) and surrender and regrant (effectively ending the old lease and granting a new one).
• Lease “transfer” documents are often executed as deeds, so signing formalities (including witnessing) must be handled properly to avoid validity issues.
• The safest approach is to review the lease terms early, understand the landlord’s requirements, and document the deal properly before you commit commercially.

General information only. This article is not legal advice and should not be relied on as such. If you need help with your specific situation, get advice from a qualified professional.

If you’d like help with assigning a commercial lease (or working out whether assignment, subletting, or surrender is best for your situation), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.